The pilot groups aren't joined together except by name.

You still see airways guys calling themselves east/west.

You still hear DAL guys reference if they were NWA or not.

UAL and CAL differentiate themselves as well saying which side they came from.

TWA guys just pretty much all got furloughed...a lot are back on property, just after 12 years is all!


I would say it could be a pride thing, where you came from, your roots, something like that.

Ever talk to a legal immigrant that is now a US citizen, he/she will still tell you which country they came from.

In the end it's probably to give history, and a pride thing if they are proud of their background and/or don't want to be associated with originally being from the other side. But, each individual is different.